[IPV6]: Per-interface statistics support.

For IP MIB (RFC4293).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 38 insertions, 19 deletions

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 88c96b10684c..27829cc4ce88 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -284,10 +284,12 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
 #ifdef CONFIG_IPV6_MIP6
         __u16 dstbuf;
 #endif
+        struct dst_entry *dst;
 
         if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
             !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
                 kfree_skb(skb);
                 return -1;
         }
@@ -298,7 +300,9 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
         dstbuf = opt->dst1;
 #endif
 
+        dst = dst_clone(skb->dst);
         if (ip6_parse_tlv(tlvprocdestopt_lst, skbp)) {
+                dst_release(dst);
                 skb = *skbp;
                 skb->h.raw += ((skb->h.raw[1]+1)<<3);
                 opt = IP6CB(skb);
@@ -310,7 +314,8 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
                 return 1;
         }
 
-        IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+        IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_INHDRERRORS);
+        dst_release(dst);
         return -1;
 }
 
@@ -365,7 +370,8 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
 
         if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
             !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
                 kfree_skb(skb);
                 return -1;
         }
@@ -374,7 +380,8 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
 
         if (ipv6_addr_is_multicast(&skb->nh.ipv6h->daddr) ||
             skb->pkt_type != PACKET_HOST) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INADDRERRORS);
                 kfree_skb(skb);
                 return -1;
         }
@@ -388,7 +395,8 @@ looped_back:
                          * processed by own
                          */
                         if (!addr) {
-                                IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+                                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                                 IPSTATS_MIB_INADDRERRORS);
                                 kfree_skb(skb);
                                 return -1;
                         }
@@ -410,7 +418,8 @@ looped_back:
         switch (hdr->type) {
         case IPV6_SRCRT_TYPE_0:
                 if (hdr->hdrlen & 0x01) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_INHDRERRORS);
                         icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->hdrlen) - skb->nh.raw);
                         return -1;
                 }
@@ -419,14 +428,16 @@ looped_back:
         case IPV6_SRCRT_TYPE_2:
                 /* Silently discard invalid RTH type 2 */
                 if (hdr->hdrlen != 2 || hdr->segments_left != 1) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_INHDRERRORS);
                         kfree_skb(skb);
                         return -1;
                 }
                 break;
 #endif
         default:
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
                 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
                 return -1;
         }
@@ -439,7 +450,8 @@ looped_back:
         n = hdr->hdrlen >> 1;
 
         if (hdr->segments_left > n) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
                 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->segments_left) - skb->nh.raw);
                 return -1;
         }
@@ -449,12 +461,14 @@ looped_back:
          */
         if (skb_cloned(skb)) {
                 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
-                kfree_skb(skb);
                 /* the copy is a forwarded packet */
                 if (skb2 == NULL) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_OUTDISCARDS);      
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_OUTDISCARDS);
+                        kfree_skb(skb);
                         return -1;
                 }
+                kfree_skb(skb);
                 *skbp = skb = skb2;
                 opt = IP6CB(skb2);
                 hdr = (struct ipv6_rt_hdr *) skb2->h.raw;
@@ -475,12 +489,14 @@ looped_back:
                 if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,
                                      (xfrm_address_t *)&skb->nh.ipv6h->saddr,
                                      IPPROTO_ROUTING) < 0) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_INADDRERRORS);
                         kfree_skb(skb);
                         return -1;
                 }
                 if (!ipv6_chk_home_addr(addr)) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_INADDRERRORS);
                         kfree_skb(skb);
                         return -1;
                 }
@@ -491,7 +507,8 @@ looped_back:
         }
 
         if (ipv6_addr_is_multicast(addr)) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INADDRERRORS);
                 kfree_skb(skb);
                 return -1;
         }
@@ -510,7 +527,8 @@ looped_back:
 
         if (skb->dst->dev->flags&IFF_LOOPBACK) {
                 if (skb->nh.ipv6h->hop_limit <= 1) {
-                        IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                         IPSTATS_MIB_INHDRERRORS);
                         icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
                                     0, skb->dev);
                         kfree_skb(skb);
@@ -632,24 +650,25 @@ static int ipv6_hop_jumbo(struct sk_buff **skbp, int optoff)
         if (skb->nh.raw[optoff+1] != 4 || (optoff&3) != 2) {
                 LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
                                skb->nh.raw[optoff+1]);
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
                 goto drop;
         }
 
         pkt_len = ntohl(*(u32*)(skb->nh.raw+optoff+2));
         if (pkt_len <= IPV6_MAXPLEN) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
                 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff+2);
                 return 0;
         }
         if (skb->nh.ipv6h->payload_len) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
                 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff);
                 return 0;
         }
 
         if (pkt_len > skb->len - sizeof(struct ipv6hdr)) {
-                IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INTRUNCATEDPKTS);
                 goto drop;
         }